OH R-CH-COOH -羟基酸 OH R-CH-COOH NH3 R-CH-COOH Q-氨基酸 NH2 CN R-CH-COOH IHO/H R-CH-COOH CN COOH 二元酸 想一想 CH3-CH-CH2-CHO- CH3-CH-CH-COOH CH3 CH3 NH2 CI-CH-CIB-CHOCI-CH-CI-COOI CH3 CH3 C CH-CH-CH-COOH N CH3-CH-CH-COOH CH3 CI CH3 NH2R CH COOH X R CH COOH CN OH￾NH3 CN - CH3 CH CH3 CH COOH Cl Cl2 P CH3 CH CH3 CH COOH NH2 NH3 CH3 CH CH3 CH3 CH CH2 CHO CH2 COOH CH3 KMnO4 H+ CH3 CH CH2 CHO CH3 CH3 CH CH3 CH COOH NH2 想一想 R CH COOH OH α-羟基酸 R CH COOH NH2 α-氨基酸 R CH COOH COOH H2O/H+ 二元酸